James a



(No Model.)

J. A. PALMER.

STEAM GENERATOR.

Patented 0015.23, 1888.

WITNESSES @NVENTOR:

RHEYS.

UNITED STATES tries...

PATENT STEAM -GENERATOR.

SPECIFICATION forming part of Letters Patent No. 391.639, dated Qctober231, 1888.

Application filed April 26, 1868.

To all whom it may concern:

Be it known that I, J AMES A. PALMER, a citizen of the United States,residing in the city and county of Philadelphia, State ofPennsylvania,have invented a new and useful Improvement in Steam- Generators, whichimprovement is fully set forth in the following specification andaccompanying drawings.

My invention consists of a steam-generator having Water-legs whichconstitute the walls of the combustiouchamber of the furnace, the upperportion whereof serves to deflect the products of combustion to acentral group of flues.

It also consists in so constructing the water-leg that the upper portionthereof directs some of the products of combustion to a peripheral rowof flues.

Figure 1 represents a partial front view and partial vertical section ofa steamgenerator embodying my invention. Fig. 2 represents a horizontalsection on line a" m, Fig. 1. Fig. 3 represents a vertical section of adetached portion thereof.

Similar letters of reference indicate corresponding parts in the severalfigures.

Referring to the drawings, A represents a steam generator consisting ofthe vertical fines B B, through which the products of combustion pass,said fines being secured to tubesheets 0, which, with the shell D,constitute the water and steam chamber or space E.

F represents a water leg or space which communicates with the chamber Eby means of tubes G, which are secured to the lower tube-sheet and theupper wall of the waterleg. The central portion of the lower tubesheetis depressed, forming a rim which enters the upper portion of thewater-leg, and the peripheral portion of said tube-sheet is above theupper wall of the water-leg, whereby the central group of fines, B, arelonger than the peripheral row of fines B. The water-leg is formed indivisions or parts trapezoidal in cross-section; but it is evident thatthe shape of the division may be that of a frustum of cones, so that ineither case the inner wall of the water-leg is donbl yinclined-that isto say, it is inclined from its base to center outwardly or diverging,and from center to top inwardly or converging. The upper end of theinner Serial No. 271,916. (X0 model.)

wall of the water-leg embraces the depressed or depending rim of thebottom of the chamber E, and said wall is scalloped or corrugated, so asto permit the products of combustion to pass the top of the leg and thusreach the outer row of fines. The sections are connected by bolts H,which pass vertically through the sections and have their heads bearingagainst the bottom wall 'of the leg, and tighteningnuts against theupper wall, or vice versa.

It will be seen that the inner wall of the water-leg forms thecombustion-chamber of the furnace; consequently the water in said legwill be highly heated,the water communicating with the chamber E, as hasbeen stated. Some of the products of combustion are deflected by theconverging wall or overhanging top of the water-leg to the bottomtubesheet and the central group of fines. Another Volume of the productsof combustion escapes through the openings at the top of the water-legformed by the scalloped edge thereof, and so reaches the outer row offines and adjacent portion of the bottom tube-sheet. After the productsof combustion leave the several fines they enter the shell or casing ofthe furnace and heat the exterior of the water-spaces, said casinghaving a suitable exit-flue for the products of combustion. It will beseen that the water in chamber E is subjected to intense heat andthereby rapidly converted into hot water and steam. As the inner wall ofthe upper section is corrugated, a great heating-surface is produced andincreased strength added to said section. In order to produce a tightjoint between the sections, packing or gasket a, of suitable material,is interposed between the same and clamped by the tightening of thebolts H, as will be seen in Fig. 8.

Having thus described my invention, what I claim as new, and desire tosecure by letters Patent, is-

1. A steam-generator having a sectional furnace with an outer spaceforming a water-leg, the inner wall of which is doubly inclined, thechamber E above said water-leg and furnace and containing the flues B B,the packing a between the sections of the water-leg, and the bolts H,binding the said sections together, said parts being combinedsubstantially as de scribed.

2. A steam-generator having a furnace with an outer space forming awater-leg, the inner wall of which is doubly inclined, the chamber Eabove said water-leg and furnace and containing the flues B B, the upperinclined wall being corrugated, said parts being combined substantiallyas described.

3. In a steam-generator, the combination of a furnace with an outerspace forming a waterleg, the inner wall of which is doubly inclined, asdescribed, and the upper inner Wall is corrugated, the chamber E abovesaid furnace and water-leg, and provided with the flues B B, the latterconnected by the sheets 0 O, a passage being formed between the rim ofthe lower of the said sheets 0 and the corrugated surface of the innerwall of the water-leg, substantially as and for the purpose set forth.

4. In a steam-generator, a water-chamber having a central depending rimformed by a lower tubesheet, with flues connected with said rim, incombination with a water leg which converges and acts as a deflector forthe products of combustion for the top water-space, substantially asdescribed.

5. A steanrgenerator having a depending rim and flues connectedtherewith, and a pcripheral portion above the base of said rim, withflues connected therewith,in combination with a water-leg whichencircles said rim and directs the products of combustion to the fluesof the depending rim and is corrugated or spaced to direct the productsof combustion to the flues of the peripheral rim, substantially asdescribed.

JAMES A. PALMER.

\Vitnesses:

THEo. C. WARNER, JAMES F. KELLY.

